Class1 FoamLogix 2.1A & 1.7AHP REV D - Manual (Page 32)

FoamLogix, Model 2.1A and 1.7AHP Class “A”
Electronic Foam Proportioning Systems
32
Separate two check valves by at least 6” to 8” (152
to 203mm) of piping to form a dead zone between
the check valves. Individual drain lines should be
used on each check valve. The waterway check
valves must be rated for 500 PSIG (34.5 BAR) test
pressure.
Flushing Water Hose
If a Hale and USFS approved Class “A” foam
concentrate is used, flushing of the Hale FoamLogix
2.1A and 1.7AHP systems is not necessary as long
as the system is used periodically.
If a flushing water hose is required to flush the
foam pump, it must have a pressure reducer/
regulator that limits the flush water pressure to
25 to 50 PSI (2 to 4 BAR). The tubing and fittings
used must be compatible with foam concentrates
being used in the system.
To be NFPA compliant, when flushing is required,
the system installer must provide proper
❑
hoses
❑
shut-off valves
❑
check valves
❑
reducer/regulator
❑
connections for flushing water for the system.
Foam Discharge Drains
Drains must be provided from foam capable
discharge piping components to prevent freezing
in cold weather. When designing the drain system
care must be taken to prevent contamination of the
water system with foam and the foam concentrate
with water. Some multiple drain systems that allow
individual drain lines to communicate also allow
foam to bypass the installed check valves causing
contamination of fire pump and the water or foam
concentrate storage tanks.
Hale offers an optional manual or air-oper ated 6-port
drain valve, Class1 Model MMD6 (p/n: 104961). The
valve provides individual drains with a single control
and is use for applications where a single point for
multiple drains is required. If a Hale MMD6 drain
valve is not used, individual drain lines and valves
for foam capable discharge piping is recommended.
Apparatus design/build for cold weather
(below freezing) duty
If the end-user will use the fire apparatus in sub-
freezing temperatures, the onus is on the fire
truck builder to build into the apparatus design
an appropriate ambient temperature operating
environment for the envelope where the FoamLogix
system will be located. This routinely takes on
the form and function of mounting the FoamLogix
system in a limited ventilation area that is served
by an appropriate pump house auxiliary heater.
Simply, the fire truck builder must keep ambient air
temperature above 32 o F (0 deg C) in the envelope
around the FoamLogix hardware, including the base
foam pump unit, foam strainer, foam concentrate
injection line, etc. There are several best practices
in the fire industry that can be employed to meet
this criteria and the fire truck builder/designer can
choose the best choice for their specific installation.
Note that there must be ventilation available to cool
the area around the unit also, to prevent electric
motor overheating when the unit is operating in high
temperature ambient environments.
Electrical Requirements
The system installer must provide the primary power
wire and a ground strap for the Hale FoamLogix
system.
Primary power must be supplied from the main
apparatus battery to the motor controller box on
the foam pump and motor assembly. The Hale
FoamLogix 2.1A and 1.7AHP require minimum 40
AMP electrical service.
Primary electrical power must be supplied directly
from the battery or the battery master disconnect
switch or solenoids to the Hale FoamLogix.
IMPORTANT!
OTHER ELECTRICAL COMPONENTS MUST NOT BE
SUPPLIED FROM THIS WIRE. DO NOT CON NECT
THE PRIMER AND HALE FOAMLOGIX TO THE SAME
POWER WIRE.
The primary power connection must be made so